Engineered for maximum reliability, superior energy efficiency, and high performance in demanding commercial settings.
Founded in 1955 under state leadership and integrated through decades of continuous structural optimization, Xi’an Lite SIMO Motor Co., Ltd. (known widely as SIMO) has grown to become the premier force in the manufacturing of large and medium-sized, high/low voltage AC motors, DC motors, synchronous motors, and specialized explosion-proof motors within China's machine industry.
SIMO represents a comprehensive, vertically integrated manufacturer and service supplier. Our infrastructure supports complex motor design, mechanical processing, high-precision mold manufacturing, final assembly, and international logistics. Maintaining a leading market capitalization and scale of production within mainland China, SIMO continues to drive industrial motor design toward advanced decarbonization goals, serving critical global sectors such as coal mining, petroleum extraction, water conservancy, metallurgy, and heavy logistics systems.
A history of engineering excellence since 1955, navigating from state ownership to a modernized global enterprise.
SIMO Motor was established under national economic governance to supply key heavy-machinery powerhouses across mainland China.
Officially renamed Xi’an Motor Factory following historical mergers. Successfully reformed from a state-owned enterprise to a modernized limited-liability company in 1999.
Establishment of SIMO Motor Group with 14 subsidiaries. relocation to an advanced, state-of-the-art technological production plant within the High-Tech Zone in 2006.
SIMO commands structured fixed assets valued at over 380 million RMB and operates 3 dedicated manufacturing plants and 1 specialized subsidiary factory. The factories are powered by more than 1,172 sets of advanced machining, winding, and automated testing equipment. The technical core is manned by 260 engineers, including 21 senior national engineers and 15 certified expert specialists. This technical force guarantees that SIMO products comply strictly with international directives and lead in thermal design, fluid mechanics, and magnetic field modeling.
Our research and manufacturing operations cover 34 major product series, over 1,800 varieties, and more than 19,500 individual specifications. Below is the systematic engineering breakdown of our primary series:
| Motor Series | Voltage & Configuration | Operational Characteristics | Typical Industrial Applications |
|---|---|---|---|
| YX / YXKK / YXKS | High Voltage (6kV / 10kV) Three-Phase Asynchronous | Premium high efficiency, energy saving, structural rigidity | Water conservancy, municipal pumping, power plant fans, large blowers |
| YR / YRKK / YRKS | Wound Rotor High Voltage | High starting torque, low starting current, step-controlled speeds | Heavy-duty crushers, mine milling plants, rolling mills, cement mixers |
| YE3 / YE4 / YE5 | Low Voltage High Efficiency Asynchronous | Meets IE3, IE4, and ultra-premium IE5 efficiency standards | General mechanical manufacturing, pumps, conveyor systems, ventilators |
| YVFE3 / YVFE4 / YVFE5 | Variable Frequency Drive (VFD) High/Low Voltage | Wide-range frequency regulation, thermal-protection independent cooling | Automated production lines, metallurgy, petrochemical flow regulation |
| YBX3 / YBX4 / YBX5 | Explosion-Proof High/Low Voltage Asynchronous | Flameproof enclosure design, compliance with Ex d I Mb & Ex d II BT4 Gb | Underground coal mining, petrochemical installations, chemical transport |
| T / TD / TK / TDMK | Large AC Synchronous Motors | Power-factor correction capacity, constant operational speed under load fluctuation | Heavy mining crushers, mine milling machines, pulp refiners, large compressors |
| Z2 / Z4 / Z Series | Medium & Large Industrial DC Motors | Fine-tuned variable speed, robust transient torque control response | Metal extrusion, paper mill rollers, marine propulsion systems, lift hoists |
Step inside SIMO's manufacturing facilities where precision engineering meets rigorous quality standards.
Industrial deployment demands specialized motor variations. General-purpose motors often fail when subjected to localized environment extremes. SIMO customizes its product outputs to meet distinct operational zones globally:
The global electric motor industry accounts for over 45% of total electric power consumption. SIMO’s technology roadmap is committed to reaching the highest thresholds of energy savings through several key initiatives:
China is home to the world's most complete and robust supply chain for heavy machinery and power generation equipment. SIMO’s manufacturing advantage is built on several key factors:
SIMO products conform to top global standards, enabling seamless deployment in any regulatory market.
SIMO has successfully passed ISO9001 Quality System Certification, European Union “CE”, United States “UL”, Russian Federation “GOST”, and China Compulsory Certificate (CCC). Our motors are deployed worldwide, backed by localized technical compliance support.
Frequently asked technical questions regarding industrial high-efficiency motors.
Our YE4 (IE4) and YE5 (IE5) series motors leverage low-loss silicon steel laminations, high-slot fill factor stator winding techniques, and optimized rotor geometries. These improvements reduce electrical resistance (I²R losses), stator core losses, and windage friction. The result is lower thermal output, longer bearing life, and significant energy savings over the motor's operating life.
Synchronous motors are ideal for high-power, low-speed applications such as mine mill drives and large reciprocating compressors. They provide constant operating speeds under load fluctuations and can run with a leading power factor. This helps correct the overall electrical power factor of the industrial facility, reducing reactive power utility penalties.
The YKK series features a steel-plate box structure with air-to-air coolers mounted on top. The YKS series uses an air-to-water heat exchanger, making it ideal for environments where water cooling is preferred or ambient air temperatures are high. These designs ensure even internal cooling, preventing localized hot spots in the motor windings.
Yes, our YBX3, YBX4, YBX5, YBK3, and YFB4 series explosion-proof motors conform to international safety regulations. They feature flameproof enclosures designed to contain internal explosions without triggering ignition in the surrounding atmosphere. They are certified for use in gas environments (Group IIA, IIB, IIC) and dust atmospheres.
Yes. SIMO is a complete, design-to-delivery manufacturer. We regularly customize mounting footprints, shaft lengths, bearings, and voltages to match existing machinery beds, minimizing downtime during retrofits.
Explosion-proof motors, mining machinery, control enclosures, and custom DC motor solutions.
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